Identify the correct sequence of steps involved in the replication of retrovirus.
A. Viral DNA is produced by reverse transcriptase
B. New viral RNA is produced by the infected cell
C. Viral RNA is introduced into cell
D. Virus infects normal animal cell
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → D, C, A, B
A retrovirus, such as HIV, has RNA as its genetic material. It multiplies inside a host cell in the following order.
D. Virus infects normal animal cell — first. The virus, with its protein coat and RNA core, attacks a normal cell.
C. Viral RNA is introduced into cell — second. The viral RNA enters the cytoplasm of the cell.
A. Viral DNA is produced by reverse transcriptase — third. The enzyme reverse transcriptase copies the RNA into viral DNA. This DNA joins the DNA of the host cell.
B. New viral RNA is produced by the infected cell — last. The infected cell makes new viral RNA and proteins, and new viruses are released to infect other cells.
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